package com.liang.thread;

/**
 * @Author:liangli
 * @Date:2020/11/21 14:10
 */
//死锁:多个线程互相抱着对方需要的资源 然后形成僵持
public class DeadLock {
    public static void main(String[] args) {
        Makeup makeup=new Makeup(0,"灰姑凉");
        Makeup makeup1=new Makeup(1,"白雪公主");
        makeup.start();
        makeup1.start();
    }
}

//口红
class Lipstick{}



//镜子
class Mirror{}
class Makeup extends Thread{
    //需要的资源只有一份 用static来保证只有一份
    static Lipstick lipstick=new Lipstick();
    static Mirror mirror=new Mirror();
    int choice;//选择
    String girlName; //使用化妆品的人
    Makeup(int choice,String girlName){
        this.choice=choice;
        this.girlName=girlName;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
    //化妆 互相持有对方的锁 就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if (choice==0){
            synchronized (lipstick){//获得口红的锁
                System.out.println(this.girlName+"获得口红的锁");
                Thread.sleep(1000);
//                synchronized (mirror){//一秒钟后想获得镜子锁
//                    System.out.println(this.girlName+"获得镜子的锁");
//                }

            }
            synchronized (mirror){//一秒钟后想获得镜子锁
                System.out.println(this.girlName+"获得镜子的锁");
            }
        }else {
            synchronized (mirror){//获得镜子锁
                System.out.println(this.girlName+"获得镜子锁");
                Thread.sleep(2000);
//                synchronized (lipstick){
//                    System.out.println(this.girlName+"获得口红的锁");  //写再这会造成死锁
//                }

            }
            synchronized (lipstick){
                System.out.println(this.girlName+"获得口红的锁");
            }
        }
    }
}













